Lock and latch.



No. 844,763, w

H. G. voIGHT.

LoGK AND LATCH. APPLICATION FILSD 00T. 17, 1906.

2 SHEETS-SHEET 1.

PATBNTED FEB. 19, 1907.`

mau/@Mu No. 844,763. PATBNTBD PEB. 19, 1907.

H. G. VOIGHT.

LOCK AND LATCH.

Arruonron FILED ooT. 17, loos.

z SHEETS-SHEET 2.

@wi/wwwa@ man.

UNITED sTATEs PATENT oEE'IoE.

HENRY G. VOIGHT, OF NEI/V BRITAIN, CONNECTICUT, ASSIGNOR TO RUS- SELL & ERVIN IVIANUFACTURING COMPANY, OF NEW BRITAIN, CON- NECTICUT, A CORPORATION OF CONNECTICUT.

LOCK AND LATCH.

Specification of Letters Patent.

Application filed October 17, 1906. Serial No, 339,294- v To all whom, t may concern.:

Be it known that I, HENRY G. Voleur, a citizen of the United States, residing at New Britain, county of Hartford, Connecticut, have invented certain new and useful Improvements in Locks and Latches, of which the following is a full, clear, and exact description.

This invention relates to im rovements in locks, and is particularly usefu as applied to hotel corridor-doors.

Among the main objects of the invention are the provision ot means whereby when a door is locked on the inside by so-called deadlocking device a key adapted to the lock and inserted from the outside Will have no effect whatever upon the latch mechanism, but will revolve freely and loosely, thereby avoiding danger of breakage as well as annoyance to the occupant ofthe room.

Anctherobject of the invention is to provide an entirely new form of master-key and master-key mechanism,

In the accompanying drawings is illustrated the preferred iform of the invention.

Figure 1 is an elevation of a lock constructed to embody the invention, the parts being shown in the position in which the latchbolt is dogged or dead-locked. Fig. 2 is a view similar to Fig. vl' of a portion of the lock, the arts being shown in another position, the atch being free to be retracted. Fig. 3 is a section on the line 3 3, Fig. 1, showing a portion ofthe door and the associated parts.

'Fig 4 is a plan view of the inside of one side of the lock-case with the clogging roll-back in place. Fig.. 5 is a view or' a tumbler detached. Fig. 6 1s a view of a slide detached.l

- Fig. 7 is a view of a key. Fig. 8 is a view of an emergency-key. Fig. 9 is a view of a portion of the caseshown in Fig. 1 with other parts in place.

1 is a latch-bolt having the usual stem and the abutment 1 on the stem of the` latchbolt 1, so that when the roll-back 2 is actuated it will cause the retraction of the latch 1. The parts thus described need not be set forth more in detail, because they are of any well-known construction.

4 isa reciprocating dogging-slide mounted in a suitable guideway in the lock-case. The latch-bolt 1 is locked against retraction when said slide is in the position shown in Fig. 1. When the slide 4 is in the position shown in Fig. 2, however, the latch-bolt 1 is free to be retracted. The slide 4 carries a pivoted tumbler 5, the free end of which stands between the shoulders 4 4b. The tumbler has a stop-shoulder 5, which stands on one side or the other of afixed stop 6 on the latch-case. In Fig. 1 this shoulder 5 stands between the stop 6 land the latch-bolt 1. Hence the latch cannot be pressed back or retracted. In Fig. 2 the shoulder 5 stands on the opposite side oi the stop-shoulder 6v and prevents the slide from accidentally moving out of the unlocked position. The means for moving the slide for the purpose of dogging the latch comprise a thumb-turn 7 or equivalent device, arranged on the inside ofthe door. This thumb-turn carries a roll-back 8, so that when the same is turned clockwise, as viewed in Fi 1, one end will engage the end of the tumb er 5I and lift it, so as to free the shoulder 5 from the stop 6. The same end of the roll-back will then engage the shoulder 4, and the slide 4 Will be moved from the locked position shown in Fig. 1 to the unlocked position shown in Fig. 2. When the thumb-turn 7 is turned in an opposite direction, the parts being as shown in Fig. 2, the roll-back 8 will iirst engage the tumbler 5 and free it and Will then engage the shoulder 4b and shift the slide 4 to the left and dead-lock the latchbolt 1.

On the opposite side of the door from the thumb-turn is a suitable lock Q-Say of the cylinder type. This lock has the usual keyhub and cam 10, and it is the intention that by means of this cam 10 the latch may be retracted. To accomplish this, the levers 11 and 12 are provided. These levers are res ectively mounted on'the opposite ends of vtlie slide 4. The normal position of the lever '11 relatively to the slide 4 is shown in Figs. 1

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using a suitable change-key 13, Fig-Zand shown in Fig. 2, accord-ing to the position of the slide 4. The cam 10 operates the latchbolt 1l through the medium of these tWo levers, the said cam engaging directly the projection 11EL of lever 11 when said retracting action takes place. The 'elevation of lever 11 (when the parts are vas shown in- Fig. 2) Will cause the lever 12 to swing back, and thus retract the latch-bolt 1. When the latch 1 is dogged, however, the lever 11 is moved entirely out of the path of movement of the cam 10. Hence an ordinary key insertedv in the lock @may be turned freely round and yround Without having any effect upon the lock mechanism. 'lo permit this, it Willf'be noticed that there is a clearance-space under the slide-4, as:l best seeninl 3". v

.Opera-tion: From the foregoing it Will'be seen that when a room is empty the dogging device Willi' of cou-rse. be thrown oit and the parts Willa stand inthe position. shown'in Fig. 2; A guest may then tenter his room hy turning the same until) the cam 10I lifts the levers 11` and 12'so as to retract latch-bolt 1f.;

He may then close the' d-oor and apply the clogging device through the medi-um of thumbturn 7 Upon doing this the lever 11 Will'he moved out of the range of operation of the eam= 116), whereupon any attempt to enter the roomby a duplicate change-key, a masterkey, on a grand-master key will? he futile. The change, master, and' grandi-master keys are similar to'v key 131, but have different bittings. i 1

If for any reason it becomes necessary to 'enter the-room evenfthough the latch is de adlncked, an emergency-key 14;y Fig. 8, may be employed for that purpose. Thisemergencykey is: of' novela construction andf operation, and' h'y'it thedogging device is first thrown oii and' then` theglatch retracted.- This emergonny-key is or greatero-ver-all length than the change-key 13, and when inserted it passes entirely through the lock 9 and its end enters a slot in the hub of a roll-back arm or cam 851, carried by abracketb and arranged line with: the emergency-key. The function of the armor c'am 8a is the same as that ofv theI cam 8 ,excepting that it is turned not hy the-thurnh-turn 7, but bya proper key inserted from the vouter side of the door. When this emergency-key is inserted in lock 91, it passes through it and engages the hub of' cam'Sa. The first turn of this key Will throw the cam. 8a and cast off the dead-locking device-.- Continued rotation of the emergencykey willi bring the cam 8a into engagement with. the lever 121, and by it the latch Will `be retracted; By this arrangement it Will be seen' that there may be a change-key for a singlelock, a master-key to iit several' such locks, requiring keys of diierent hitting, a lgrand-master key fitting all the locks in the uilding, and an emergency-key, which Will is being dogged.

do all that the iirst three keys .Will do and Will also operate the dead-lock. All four of these keys are used in the saine keyvvay, yet they each have their oWn peculiar functions.

, 8C is a spring for preventing the accidental dislodgment of the cam 8a, so as to hold it in its normal position ready to'be engaged by the end of the emergency-key when the same is inserted. An obvious modification Would` be to cause the emergency-key .to directly engage the roll-backS instead of employing the third roll-back or arm 8a.; but the form shown is' preferable. It will be noted tha-t the knob-operable roll-back 2 is operv able from'l the inner-side of the dooronly. Access to the room orl apartment is gained only by the use of one ofthe proper keys.

What is claimed is.-

1. In a lock, a latch-bolt, a dead-locking device therefor, separate latchretracting .means carried by saidL dead-locking device, 4means for actuating said l'atch-retracting mechanism Jfrom the outer side or the lock When said dead-locking device is out of action, said means, being out of range of. operation' of saidl externally-controlled means When said dead-locking device is in action.

2. In a lock, a latch-bolt, a dead-locking* slide and' means at thel inner side ot the lock for throwing-said slide into or out of action, Iseparate means carried 'bysaid dead-locking slide arranged to retract sai-d latch-bolt, keycontrolled means cooperating therewithA independently ofthe means for throwing the slide into and out of action and operable from the outer side of the door only, andi cooperating with said latch-retracting means only' when the dead-locking slide is thrown off/,and out of action. j Y

31; In a lock, a latch mechanism including a plurality of' hubs arranged in line, one of said hubs being operable independently, a master-key therefor of sufficient length to pass entirely through one of. said hubs and engage another for the purpose of` operating dependently the hubs thus coupled.

4. In a latchx mechanism, a bolt, actuating means` including a holt-retracting lever, a separate dead-locking device for d'ogging'said holt, said bolt-retracting lever `heing carried thereby, means accessiblerom theinner side of the door to move the dead-locking device, means accessible from the outer side ot the door by one key to operate the holt-retracting lever, and independent operating devices controlled by a different key whereby both the dead-lockingl device and lthe latch-bolt may be movedrom thel outerside of the door.

5. In a latch mechanism, a latch, latchactuating means including a lever, a deadlocking device independent of said lever for' clogging the latch, and means to movethe dead-locking device and said lever bodily out of the range of action of the key as the latch.

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6. In a latch mechanism, dead-locking device arranged to coact with said bolt, means accessible from the inner side of the lock for moving said dead-locking device into and out of its operative position, a plurality of cooperating levers carried by but independent of said dead-locking device, one of said levers engaging said bolt, the other lever being engaged by independent key-controlled mechanism operable from the outer side of the lock when the dead-locking slide is out of action, said last-mentioned lever being out of range 'of engagement by said keycontrolled mechanism when said dead-locking slide is in action. i

7. In a lock, a latch-bolt, a dead-lock therefor, dead-lock-controlling means at the inside of the door for throwing said deadlock, said means including a manually-operable roll-back hub, a key-controlled cam in front of said dead-lock-controlling means and operable by means of a key inserted from the outer side of the door, said cam cooperating with .the latch-bolt to retract the latter when the dead-lock is off by the use of one key, and a key of suflicient over-all length to engage both the latch-bolt-operating mechanism and the dead-lock-operating mechanism to secure dependent operation of said parts.

8. In a lock, a latch bolt or head, a deadlocking device therefor, knob mechanism, or the like, to retract the latch-bolt when the dead-locking device is off, key-controlled mechanism independentof said knob mechanism and operable from the outer side ofthe door for operating either the dead-locking device r the latch-bolt or both, said keycontrolled mechanism including two independent hubs `arranged in line .and operating respectivelythe latch-bolt and the dead-lockoperating hub, and means at the inner side of the door independent of the knob mechanism for operating the dead-lock independently of the key-controlled mechanism foroperating the latch-bolt. f

9. In a lock, a change-key andan emergencykey, said emergency-key being of greater over-all length than the change-key, said lock having a single key way or passage adapted to both of said keys.

10. In a latch mechanism, dogging device therefor, a separate latch-retracting device carried thereby, separate means for independently operating said latch a latch-bolt,l a

a latch-bolt," a and said dogging device, said operating means being arranged substantially in line, and a key arranged to cooperate with both of said operating means by passing through one and into the other.

11. In a latch mechanism, a latch-bolt, a dogging device, independent .operating devices accessible from the opposite sides of the lock for the independent operation of the parts, and means forsecuring dependent operation of said parts by the use of a suitable single key arranged to engage parts of both of said operating means at the same time whereby said latch-bolt and clogging device may be operated dependently as well as independently.

12. In a latch mechanism, ent devices to be operated, two separate means for operating the said devices respectively, a single key arranged to cooperate with and couple both of said operating devices by passing through one and into the other, one of said operating devices being capable of independent operation by the use of a shorter key. l

13. In a latch mechanism, a latch-bolt, a dead-locking device therefor, a roll-back operable from the inner side of the door only for actuating said dead-locking device, a second roll-back operable the lock only for retracting the latch-bolt, and a third roll-back for operating the deadlock and arranged to be coupledwith the second-mentioned roll-back b the use of a suitable key whereby both` t ie dead-lock and latch-bolt may be operated dependently `as well as independently from the outside.

14. In a latch mechanism, a latch-bolt, a

deadlocking device therefor, akey-controlled hub for retracting the latch, a second keycontrolled hub independent ofthe first and in line therewith for actuating the dead-locking slide, the former being outside of the latter, a pin-cylinder lock having a key-passage in line with said hub and two keys of different over-all lengths', the shorter one actuating only one of said hubs, the. longer one being arranged to operatively connect or couple both of said hubs. f

HENRY c. voiGHT. lVitnesses:

G. ERNEST RooT, WM. V. CALLUM.

two independ-k from the opposite side of I IOO 

